gpio: add Intel Moorestown Platform Langwell chip gpio driver
The Langwell chip is the IO hub for Intel Moorestown platform which has a
64-pin gpio block device inside. It is exposed as a dedicated PCI device.
We use it to control outside peripheral as well as to do IRQ demuxing.
The gpio block uses MSI to send level type interrupt to IOAPIC.
Signed-off-by: Alek Du <alek.du@intel.com>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index ccca08e..9ad20ff 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -180,6 +180,12 @@
If unsure, say N.
+config GPIO_LANGWELL
+ bool "Intel Moorestown Platform Langwell GPIO support"
+ depends on PCI
+ help
+ Say Y here to support Intel Moorestown platform GPIO.
+
comment "SPI GPIO expanders:"
config GPIO_MAX7301